Dozens of dogs seized in an investigation into possible dogfighting on land owned by Atlanta Falcons star Michael Vick likely would be euthanized if investigators determine they are fighting dogs, the Humane Society said. "Almost 100 percent" of animals seized in dogfighting investigations are euthanized because they have a level of aggression that makes them dangerous pets and neighbors, said John Goodwin, a spokesman for the Humane Society of the United States. "It's simply not fair to someone who has a black lab or a Yorkie to have a fighting dog next door because if that dog gets loose, he's going to ... kill that person's pet," Goodwin said, making it clear he was speaking in generic terms only.